The incident comes not long after President Barack Obama proposed to enforce a ban on assault weapons as well as introducing more thorough background checks.

Yorgason criticised the gun-carrying shopper, identified as Joseph Kelley, stating: "I thought that he was pretty much an idiot. You do not need to do something like this even if you are against any potential bans."

She added that other customers were noticeably avoiding him.

Kelley, 22, told The Salt Lake Tribune: "I felt no negative vibes from anyone. I think it went rather surprisingly well."